Sylvester j



s. J. SHERMAN.

Hot Air Register. I

No. 18,356.- Patented Oct. 6 1857'.

Witnesses: Invenfar; $1M i4 7. ./M,/Wm

UNITED STATES PATENT OFFICE.

SYLVESTER J. SHERMAN, OF NEW YORK, N. Y.

HOT-AIR REGISTER.

Specification of Letters Patent No. 18,356, dated October 6, 1857.

To all whom it may concern:

Be it known that I, SYLVESTERJ. SHER- MAN, of the city, county, andState of New York, have invented new and useful Improvements in Hot-AirRegisters; and I do hereby declare that the following is a full andexact description thereof, reference be ing had to the accompanyingdrawings, in all of which like letters and figures refer to like parts.

The nature of my invention consists in the peculiar construction andarrangement hereinafter described of a spring bar connecting the fanswith the top plate of a hot air register.

One end of the spring is armed with a knob or handle which passesthrough and slides within a slot in the top plate. This slot is placedat or near the center of the top plate, and by this arrangement thespring bar acts upon the valves to far better advantage than it would ifplaced at either end. The knob or handle on being moved back or forth,the spring bar will open or close the fans, adapting itself readily toany change of position and hold with a proper degree of tension at anygiven inclination of said fans in relation to the plate. This I believeis a distinctive feature of my improved hot air registerrand theadvantages arising therefrom are manifold. By this arrangement thespring is caused to act permanently, even when the register is closedand the fans or valves are kept tight shut by the constant strainexerted by the spring, thus preventing the hot air from escaping. In allother hot air registers known to me the spring bears directly againstthe top plate, the spring acts then by friction between itself and thetop plate; the consequence is that it will soon wear out and becomeuseless. I have obviated this by securing the upper end of the spring toa sleigh or sliding plate to which is fixed the knob. Cook & Garrettsregisters as well as others in the market, having their working gearattached to the end by screws or bolts and nuts, are liable to Work andcome apart and fall to pieces by the working of the register, while myspring bar and connecting rod are so constructed as to hold themselvesin place and cannot be displaced by the working or changing position ofthe register.

In the drawings, Figure l is a plan view of my improved register, withthe top or face of the frame removed and with the fans partially open.Fig. 2, is a cross section of the register showing the spring bar withthe fans closed. Fig. 3, is a cross section of the register showing thespring bar with the fans partly open.

A is the frame or case of the register.

B, B, B, are the fans of the register.

C is the connecting rod which connects the fans together.

D, D, are the ears cast on the fans.

2, 2, are pins projecting from the connecting rod and passing throughholes in the ears of the fans.

E is the spring bar which connects at 3 with the connecting rod, and at4 with the top or face of the register.

F is the knob or handle attached to the spring bar passing through andworkingin the slot Gr. The spring bar terminates at the upper end in theplate 5, so as to more evenly slide against the under side of the piecehaving the slot in it. This spring bar should be made of steel and thinenough so as to be quite elastic. The size of the several parts may besuch as may be required.

The operation is as follows: Commencing with the fans closed as in Fig.2, as the knob or handle is slid or moved through the slots the fans aredrawn open, and as the fans open their connecting rod approaches nearerto the top of the register and thereby bends up and changes the positionof the spring. As the knob or handle is moved back the connecting roddescends allowing the spring bar to gradually resume its originalposition. During the operation a constant impingement of the spring iskept so that the fans may be held thereby at any desirable position.

What I claim as my invention and desire to secure by Letters Patentis 1. Interposing between the top plate of hot air registers and thespring bar to which the fans are attached either directly or by means ofa connecting rod, a slide plate, to which the end of the spring barnearest to said top plate, on one side and the knob or handle on theother side, are permanently fixed substantially as described.

2. I also claim locating the spring bar at or near the center of the topplate, whereby its action upon the fans of hot air registers is equallyand uniformly distributed.

SYLVE STER J. SHERMAN.

In presence of MELVILLE V. BIGGS, M. B. ANDRUS.

